Bluetake Hi-PHONO BT460EX Bluetooth Hi-Fi audio station kit

Home theater is great.  Wiring those rear speakers in't. 
Bluetake have created the Hi-PHONO BT460EX Bluetooth Hi-Fi audio station kit to help with the situation, which makes any pair of rear speakers wireless, using Bluetooth and D/A converters.  While it will reduce issues with running speaker cable from your AV receiver, the kit still uses a lot of cables. And there are a couple of other problems.
There is some reported delay time, and Bluetake acknowledged at least 0.1 second of delay due to the D/A A/D conversion
(which means the sound will be out of sync with the picture when you watch a movie).  It also runs at 2.4Ghz,
which could cause some interference with other wireless devices in your home at that frequency (like yer WiFi network).